Exterior surface of automobile side door



FIG. 1 is a side perspective view from in front of an exterior surfaceof automobile side door, showing an automobile left side door accordingto our novel design; and

FIG. 2 is a side view of the exterior surface of automobile side door,showing the vehicle left side door according to our novel design.

The dash line showing of adjacent automobile parts is only for showingthe surrounding environment and is not part of the claimed design.

The ornamental design for an exterior surface of automobile side door,as shown and described.